A representative sample of trees in a forest shows the trees to have a mean circumference of 19.7 inches and a standard deviation of 1.3 inches. Assuming the circumferences are normally distributed, what is the z-score for a tree with a circumference of 22 inches? a -1.77 b -6.85 c 6.85 d 1.77

Q: Scores for students on the verbal portion of the SAT-I test are normally distributed with a mean of…

A: Denote X as the Sat-I test score. It is given that X is normally distributed, with mean μ = 509 and…

Q: Jason took his Siberian Husky dog to the veterinarian. The dog was put on a scale and found to weigh…

A: The Z-score of a random variable X is defined as follows: Z = (X – µ)/σ. Here, µ and σ are the mean…

Q: The weights of college students at a particular college has a normal distribution with a mean of 126…

A: Let random variable X represents the weights of college students at a particular college.…

Q: The average class size this semester in the business school of a particular university is 39.0…

A: We have find Z score..

Q: A physical fitness association is including the mile run in its school fitness program. The time for…

A:

Q: Josh is 11 years old and is 54 inches tall.  If heights of 11-year-olds are from a Normal…

A: We can find the z score as below

Q: Engineers must consider the breadths of male heads when designing helmets. The company researchers…

A: Let X be the breadth of male head. Here, X ~N(6.3, 1.12). X~N(6.3,1.12)⇒Z=X-6.31.1~N(0,1)Here, let…

Q: lab supply company sells pieces of Douglas fir 4 inches long and 1.5 inches square for force…

A:

Q: Engineers must consider the breadths of male heads when designing helmets. The company researchers…

A: Given : Population Mean,μ = 6.3 Population Standard Deviation,σ = 1.1

Q: Q4. Suppose that the daily miles driven by a trucking company is normally distributed with a mean of…

A: Mean(µ) = 330Standard deviations (σ) = 115X ~ N (µ, σ )= N(330, 115)

Q: Bundles of firewood are normally distributed with a mean of 20 pounds, and a standard deviation of 2…

A:

Q: Engineers must consider the breadths of male heads when designing helmets. The company researchers…

A:

Q: Use z-scores to make the following comparison. A high school student took two college entrance…

A: z-score:X follows a distribution that has mean µ and the standard deviation σ. It is the number of…

Q: The average income in the city of Red Deer is $85,000 with a standard deviation of $20,000.  A…

A: It is given that the mean is $85,000 and the standard deviation is $20,000.

Q: Using the accompanying table of data, blood platelet counts of women have a bell-shaped distribution…

A: Since you have asked multiple questions, we will solve the first question for you. If you want any…

Q: chickens. He records his harvest of eggs for 20 days. He finds that the average per day is 290 eggs…

A: Here use single sample t test

Q: Students in a biology class planted eight mongo seeds in separate plastic cups and placed them under…

A: The range of data is given by: R=H-L By observation the highest value is 10.3 and the lowest is 5.7…

Q: In a certain state, the recent average critical reading standardized test score was 540. Assume that…

A: P(X<500)=Pz<500-540100=P(z<-0.4)=0.3446=34.46% Therefore the correct option is A option.

Q: ngineers must consider the breadths of male heads when designing helmets. The company researchers…

A:

Q: Engineers must consider the breadths of male heads when designing helmets. The company researchers…

A: Given : Population Mean,μ = 5.6 Population Standard Deviation,σ = 1.2

Q: Kindergarten Companies that design furniture forelementary school classrooms produce a variety of…

A:

Q: Engineers must consider the breadths of male heads when designing helmets. The company researchers…

A:

Q: The time sent waiting to hear back from a particular therapist office follows a normal distribution…

A: Given:Mean μ=204 standard deviation σ=25.7 What is the probability that a randomly selected person…

Q: Q4. A set of final examination grades in an introductory statistics course is normally distributed,…

A:

Q: In 1990

A: In 1990, the sale prices of homes in the area were approximately normal with a mean of $150,000 and…

Q: A household spends on average of P5,500 for a 2-week period grocery items. The variable is normally…

A: Given,mean(μ)=5500standard deviation(σ)=700

Q: The heights of women have a symmetric distribution with a mean of 63 inches and a standard deviation…

A: It is given that the heights of women follows a normal distribution with a mean 63 inches and a…

Q: Watching TV The 2012 general Social Survey asked a large number of people how much time they spent…

A: Given

Q: A city mayor in Michigan is planning the number of new snow plows he must purchase to remove the…

A: Here, µ=112, σ=14, and n=10.

Q: Engineers must consider the breadths of male heads when designing helmets. The company researchers…

A:

Q: The brand of corn flakes come in a box that says it holds 32 ounces of cereal. The manufacturer says…

A: Note- As per our policy we can answer only the first 3 sub-parts of a question. If you want…

Q: A rainstorm in Portland, Oregon, wipes out the electricity in 5% of the households in the city.…

A: a. Consider that p is population proportion of households with no electricity.

Q: Using the accompanying table of data, blood platelet counts of women have a bell-shaped distribution…

A: In this question, it has been given that blood platelet counts of women have bell shaped…

Q: Kindergarten Companies that design furniture for elementary school classrooms produce a variety of…

A: Solution: 55. Let X be the height of kindergarten children. From the given information, X follows…

Q: Engineers must consider the breadths of male heads when designing helmets. The company researchers…

A: given population  mean  = 6.7 standard deviation = 1.2 the  range would  expect to find the middle…

Q: The numbers of pages in the books in a library follow a normal distribution. If the mean number of…

A:

Q: Use technology or Z distribution table to find the indicated area the weight of grapefruits in a bin…

A: From the given information, the weight of grapefruits in a bin are normally distributed with a mean…

Q: Researchers measured the data speeds for a particular smartphone carrier at 50 airports. The highest…

A: We have to fill given blanks.

Q: Researchers measured the data speeds for a particular smartphone carrier at 50 airports. The highest…

A: The provided information are: X=77.8 Sample size=n=50 mean=μ=16.56 Standard deviation =s=35.08 To…

Q: Maple trees in a large forest have heights that are normally distributed with a mean of 95 feet and…

A:

Q: Engineers must consider the breadths of male heads when designing helmets. The company researchers…

A:

Q: A study reported that finger rings increase the growth of bacteria on health-care workers’ hands.…

A: INTRODUCTION :  The Sampling Distribution :             the sampling distribution is the set of…

Q: Watching TV: The 2012 general Social Survey asked a large number of people how much time they spent…

A: Given , Sample size = n = 32 Sample standard deviation = s = 3.2 Claim : The population standard…

Q: The time spent waiting for a liver transplant for people aged 28-42 in a recent year followd a…

A: The time spent waiting for a liver transplant for people aged 28-42 in a recent year followd a…

Q: Engineers must consider the breadths of male heads when designing helmets. The company researchers…

A:

Q: Engineers must consider the breadths of male heads when designing helmets. The company researchers…

A: Determine the range would you expect to find the middle 50% of most head breadths. The range that…

Q: Companies who design furniture for elementary school classrooms produce a variety of sizes for kids…

A: Given Information :  Companies who design furniture for elementary school classrooms produce a…

Q: Renee scores an average of 198 points in a game of bowling, and the points are normally distributed.…

A: The Z-score of a random variable X is defined as follows: Z = (X – µ)/σ. Here, µ and σ are the mean…

Q: find the mean and standard deviation for A B C Sample a: 12. 21.30 Sample b: 70, 79,88 Sample…

A: Given information- We have given 3 samples. Sample a, sample b, sample c. We have to find the mean…

Estimation

A new framework of data analysis where the new statistical methods are used for interpreting the results and analyzing the data is known as estimation in statistics.